Lock



June 5, 1934.

H. G. RUBNER 1,961,456

LOCK

Filed. June 9, 1933 2 Sheets-Sheet l SMALL 1 72470 EFL/27mm eguy W Patented June 1934 UNITED STATES LOCK Hugo G. Rubner, Milwaukee, Wis., assignor to Briggs & Stratton Corporation, Milwaukee, Wis., a corporation of Delaware Application June 9, 1933, Serial No.'674,995

15 Claims. (01. 70-46) This invention relates to certain new and useful improvements in looks and has as a general object to provide a novel cover for cylinder locks, especially that type used with automotive .5 vehicle door handles.

More specifically, it is an object of this invention to provide means for automatically moving a cover to its fully open position and for holding it in said position during rotation of the cylinder.

A further object of this invention is to provide a lock of the character described having a cover for the exposed end of its cylinder, and means associated with the cover and cylinder whereby the cover is positively held open so as to facilitate actuation of the lock.

Another object of this invention is to hingedly mount the dust cover in such a manner that the hinge pin is concealed and the cover is closed.

In this connection, it is a further object of the present invention to provide a cover mounting ring to which the cover is hingedly attached and which is set into the outer end of the lock casing or body to be retained in position by the head of the lock cylinder.

With the above and other objects in view which will appear as the description proceeds, .my invention resides in the novel construction,

I 3.0 combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in .the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims.

In the accompanying drawings, I have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles thereof and in which:

Figure 1 is a view partly in side elevation and partly in section through a lock embodying this 15 invention;

Figure 2 is a front end view of the lock show* ing the cover in its raised or open position; and Figure 3 is a perspective view of the cover, the front end of the cylinder, a cover mounting member, and the lock casing front end portion,

shown disassembled.

Referring now more particularly to the accompanying drawings in which like numerals indicate like parts throughout the several views,

.55 thenumeral 5 designatesa lock casing which in the present instance is in the form of an automotive vehicle door handle. This casing is bored as at 6 to receive a lock cylinder '7. The cylinder '7 is provided with the usual tumblers 8 which are yieldably projectable into 0 either of two diametrically opposite tumbler grooves 9 in the casing to secure the cylinder against rotation, the tumblers being retractable upon the insertion of a proper key 10, to free the cylinder for rotation.

It is observed that the grooves 9 are so disposed that the tumblers when in engagement therewith, have their axes lying in a horizontal plane. Consequently, the key-way 11 of the lock cylinder is also in a horizontal plane when the cylinder is in either of its limits of rotation.

The front end of the bore 6'in the casing is counterbored as at 12 to receive a cover mounting rin ,13, which is preferably pressed into place. ,The inner diameter of the ring 13 is counterbored to receive an enlarged head or flange 14 on the outer front end of the cylinder, the head of the cylinder engaging the shoulder formed by the bottom of the counterbore so that the cylinder positively retains the cover 30 mounting ring in place. The inner Wall of the flange orhead 14 is stepped to define two substantially opposite shoulders 15 which collide with the opposite sides of a lug or projection 16 extended from the bottom of the counterbore in 35 the ring 13 to define the normal limits of rotation of the lock cylinder.

The position of the shoulders 15 and the width of the projection 16 is such that the lock cylinder is permitted to turn through one hundred and eighty degrees so that the operative ends of the tumblers may be moved from engagement with one of the grooves 9 into a position for engagement with the other groove 9.

Extending upwardly from the ring 13 are two spaced arms 1'? which project into a pocket 18 formed in the casing outer end portion in communication with the counterbore 12. These arms 17 are provided with axially aligned bores 19 to receive a hinge pin 20 which projects beyond the sides of the arms to be journalled in cars 21 formed on a cover 22. The cover 22 is thus hingedly mounted to swing to and from a closed position disposed over the front of the lock cylinder.

It is observed that when the entire structure is assembled, the ends of the hinge pin 20 are covered by the opposite side walls of the enlarged upper portion 17 of an outer recess 18' communicating with the counterbore 12 and in' which the cover is received when closed. The hinge pin 20 is thus invisible when the cover is closed.

A torsion spring 23 coiled about the hinge pin 26 and having one end 24 abutting part of the ring member 13 and its other end 25 engaging the cover as clearly shown in Figure l, yieldably urges the cover to its closed position. The cover may be opened against the action of the spring 23 by lifting the same manually and to facilitate such lifting, its outer end is notched as at 26.

To obviate the necessity of manually holding the cover open during the actuation of the lock, means are provided by this invention to automatically move the cover to its fully open position after it has been partially raised to permit the insertion of the key, and the cylinder turned from either of its normal limits of rotation. To effect this purpose, the cover is provided with a centrally located abutment 27 which is engageable with the peripheral edge 28 of the cylinder. When so engaged, the cover is positively held in its raised or open position against the action of the spring 23.

When the cylinder is in either of its normal limits of movement, however, the abutment 27 is disposed in one or the other of two diametrically opposite recesses 29 formed in the head or flange 14 on the front of the cylinder. One side of each recess is inclined at its outer end to form a cam surface 36 so that upon lifting of the cover a distance sufficient to engage the abutment with the beginning of the inclined surface 30, which degree of opening is necessary to permit the insertion of the key, and upon rotation of the cylinder, the cam surface engaging with the abutment will automatically move the cover to its fully open position.

Having been moved to its fully open position, the cover is held thus by the engagement of the abutment with the peripheral edge 28 of the cylinder until the cylinder is turned sufiiciently to align the other recess 29 with the abutment, whereupon the abutment enters said other recess and upon withdrawal of the key, the spring 23 closes the cover.

It is thus observed that the cover is automatically opened upon initial rotation of the cylinder and is positively held in its open position throughout the actuation of the lock, and that the cover cannot be closed unless the cylinder is turned'to either of its limits of rotation. This affords an indication of the position of the cylinder and precludes the possibility of leaving the cylinder in any position other than fully locked or unlocked, which sometimes is possible where the key and tumblers are worn and permit the withdrawal of the key When the cylinder is still in an intermediate position.

From the foregoing description taken in conneotion with the accompanying drawings, it will be readily apparent to those skilled in the art that this invention affords a novel dust cover construction for cylinder locks which has the advantage of having its hinge pin entirely concealed and inaccessible when the cover is closed and in which cooperating means on the cover and the lock cylinder automatically hold the cover in an open position during actuation of the cylinder.

What I claim as my invention is:

1. In a lock including a lock cylinder, a cover for the front end of the lock cylinder, and. means on the lock cylinder to move the cover during turning of the cylinder.

2. In a lock including a lock cylinder, a cover hinged on an axis substantially parallel to the face of the lock cylinder to swing to and from a position over the lock cylinder, and cooperating means carried by the lock cylinder and the cover to hold the cover in an open position.

3. In a lock including a rotatable look cylinder, 2. cover hingedly mounted to swing over the lock cylinder, means to yi ldably urge the cover to its closed position, and cooperating means on the lock cylinder and cover to move the cover during a predetermined degree of rotation of the lock cylinder;

4. In a lock including a casing and a lock cylinder mounted therein, a cover, means hingedly mounting the cover from the casing to swing over the cylinder, and cam means or erable upon turn ng of the cylinder to move the cover to its open position and to hold the cover in said open position.

5. In a lock including a rotatable lock cylinder, a cover hingedly mounted to swing to and from a closed position disposed over the lock cylinder, and cooperating means on the cylinder and cover to prevent closing of the cover except when the cylinder is in a predetermined position of rotation.

6. In a lock including a casing and a lock cylinder mounted therein, a cover hinged to the casing to swing to and from a closed position disposed over the cylinder, an abutment on the cover engageable with the cylinder to hold the cover in open position, and said cylinder being recessed to receive said abutment upon turning of the cylinder to a predetermined position.

7. In a lock comprising a casing and a lock cylinder rotatably mounted therein, a cover hingedly mounted from the casing to swing to and from a closed position disposed over the lock cylinder, yieldable means to urge the cover to its closed position, a cam on the lock cylinder, and an abutment on the cover engageable by the cam, whereby turning of the lock cylinder moves the cover against the force of the yieldable means to fully open position and holds the same in said open position throughout a predetermined degree of rotation of the cylinder.

8. In a lock including a casing and a lock cylinder rotatable therein between predetermined limits, a cover hingedly mounted from the casing to swing to and from a closed position disposed over the lock cylinder, an abutment on the cover engageable with the lock cylinder, and yieldable means to urge the cover toward said closed position and the abutment thereon into engagement with the lock cylinder, said abutment being movable into a recess in the lock cylinder at each limit of rotation of the cylinder to permit the cover to close.

9. In a lock including a casing and a lock cylinder rotatable therein between predetermined limits and having a recess opening to the front end thereof with one side of the recess inclined to form a cam, a cover hingedly mounted from the casing to swing to and from a closed position disposed over the cylinder front end, means to yieldably urge the cover toward said closed position, and a stop on the cover engageable in said recess in the cylinder when the cover is closed and engageable by the inclined wall of the recess, whereby during rotation of the cylinder the cover is moved to its fully open position.

10. In a lock including a casing and a lock cylinder rotatable therein, a member carried by the casing and encircling the front end portion of the cylinder, cooperating means on said member and the cylinder to define the limits of rotation of the cylinder, a cover for the front end of the cylinder, and means hingedly mounting the cover from said member for movement to and from a closed position disposed over the front end of the cylinder.

11. In a lock including a bored casing and a lock cylinder rotatable therein, the casing having a recess communicating with the outer end of its bore, a cover for the outer end of the cylinder, and a cover mounting member to which the cover is hingedly connected disposed in the recess at the outer end of the casing bore and retained in position by the lock cylinder.

12. In a lock including a bored casing and a lock cylinder rotatable therein, the casing having a recess communicating with the outer end of its bore, a cover for the outer end of the cylinder adapted to fit in said recess, a cover mounting member inserted in said casing recess, and a hinge pin to hingedly mount the cover from said member, the hinge pin being entirely within the recess of the casing so that the walls of the recess cover the ends of the hinge pin.

13. In a lock including a bored casing and a lock cylinder rotatable therein, a hinged cover for the front end of the cylinder, and a separate cover mounting member to which the cover is hingedly attached assembled with the casing to mount the cover in position with its hinge pin inaccessible and invisible when the cover is closed.

14. In a lock including a bored casing and a lock cylinder rotatable therein, a hinged cover for the front end of the cylinder, a separate cover mounting member to which the cover is hingedly attached assembled with the casing to mount the cover in position with its hinge pin inaccessible and invisible when the cover is closed, and means on the cylinder to retain the cover mounting member assembled with the casing.

15. In a lock including a bored casing and a lock cylinder rotatable therein, the casing being counterbored and recessed at the outer end of its bore, a cover mounting ring disposed in the counterbore of the casing, co-operating means on the cover mounting ring and cylinder whereby the cylinder retains the cover mounting ring assembled with the casing, a cover to fit in the recess of the casing, and a hinge pin hingedly mounting the cover from said cover mounting ring, the hinge pin being disposed entirely within the recess to be inaccessible and invisible when the cover is closed.

HUGO G. RUBNER. 

